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Finding the Fourth Proportional to 159,878.40, 239,702.40 and 89,779.20

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Solution

The fourth proportional to 159,878.40, 239,702.40 and 89,779.20 is: 134,604.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,878.40 : 239,702.40 = 89,779.20 : x
  2. Step 2: Convert to fraction form
    159,878.40/239,702.40 = 89,779.20/x
  3. Step 3: Cross multiply
    159,878.40x = 239,702.40 × 89,779.20
  4. Step 4: Simplify right side
    159,878.40x = 21,520,289,710.08
  5. Step 5: Solve for x
    x = 21,520,289,710.08/159,878.40
  6. Step 6: Final answer
    x = 134,604.11

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.